I've no idea if she will be in the past 1973 setting (or who might be playing her younger self if she is) so for these ones I'm sticking to the one's I know of who are in both the past & future settings.

I've done Wolverine & Magneto so the only other one I'm sure of (atm) is Professor X.

One could still do what they looked like in the original trilogy compared to what the look like in the future ie Storm's mohawk and incampment suit.